1 files changed, 74 insertions, 0 deletions
diff --git a/vendor/phpseclib/phpseclib2_compat/src/Crypt/RC4.php b/vendor/phpseclib/phpseclib2_compat/src/Crypt/RC4.php
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index 000000000..78781f553
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+++ b/vendor/phpseclib/phpseclib2_compat/src/Crypt/RC4.php
@@ -0,0 +1,74 @@
+<?php
+
+/**
+ * Pure-PHP implementation of RC4.
+ *
+ * Uses mcrypt, if available, and an internal implementation, otherwise.
+ *
+ * PHP version 5
+ *
+ * Useful resources are as follows:
+ *
+ *  - {@link http://www.mozilla.org/projects/security/pki/nss/draft-kaukonen-cipher-arcfour-03.txt ARCFOUR Algorithm}
+ *  - {@link http://en.wikipedia.org/wiki/RC4 - Wikipedia: RC4}
+ *
+ * RC4 is also known as ARCFOUR or ARC4.  The reason is elaborated upon at Wikipedia.  This class is named RC4 and not
+ * ARCFOUR or ARC4 because RC4 is how it is referred to in the SSH1 specification.
+ *
+ * Here's a short example of how to use this library:
+ * <code>
+ * <?php
+ *    include 'vendor/autoload.php';
+ *
+ *    $rc4 = new \phpseclib\Crypt\RC4();
+ *
+ *    $rc4->setKey('abcdefgh');
+ *
+ *    $size = 10 * 1024;
+ *    $plaintext = '';
+ *    for ($i = 0; $i < $size; $i++) {
+ *        $plaintext.= 'a';
+ *    }
+ *
+ *    echo $rc4->decrypt($rc4->encrypt($plaintext));
+ * ?>
+ * </code>
+ *
+ * @category  Crypt
+ * @package   RC4
+ * @author    Jim Wigginton <terrafrost@php.net>
+ * @copyright 2007 Jim Wigginton
+ * @license   http://www.opensource.org/licenses/mit-license.html  MIT License
+ * @link      http://phpseclib.sourceforge.net
+ */
+
+namespace phpseclib\Crypt;
+
+/**
+ * Pure-PHP implementation of RC4.
+ *
+ * @package RC4
+ * @author  Jim Wigginton <terrafrost@php.net>
+ * @access  public
+ */
+class RC4 extends Base
+{
+    /**
+     * Turns key lengths, be they valid or invalid, to valid key lengths
+     *
+     * @param int $length
+     * @access private
+     * @return int
+     */
+    protected function calculateNewKeyLength($length)
+    {
+        switch (true) {
+            case $length < 8:
+                return 8;
+            case $length > 2048:
+                return 2048;
+        }
+
+        return $length;
+    }
+}
+\ No newline at end of file